Not able to access ntlworld email on VM but can on Thunderbird and Mobile
We have 2 ntlworld email addresses, a main and a subsidery. I have noticed for a while that the subsidery couldn't be accessed on VM but I didn't bother because it still worked ok on Thunderbird and my mobile phone. My main PC has started playing up so I thought I would use my laptop and set up the emails on Thunderbird on it. However when I try to set it up it says "Unable to log in to the server, probable wrong configuration, username or password."
When I tried to access the subsidery email on VM by editing the settings it wouldn't work and gave the following message: "The entered credential or authentication information does not work or are no longer accepted by provider. Please change them."
I would be grateful for help on how to sort this out.